Lamp hanger



P 1936- J. T. SEYLER 7 2,054,886 I I LAMP HANGER I Filed Dec. 10, 1954 A TTORNEYS.

Patented Sept. 22, 1936 UNITED STATES" PATENT OFFICE John T. Seyler, Pittsburgh,fPa.', assignor ,to Seyler Manufacturing Company, Pittsburgh, Pa.,. 'a.

' corporation of Pennsylvania- Application December 10, 1934,. Serial No. 756,782

3 Claims.

This invention relates to improvements in lamp hangers of the character employed in suspending electric lamps or lighting fixtures, from a mast arm or the like, and contemplatesa simple and efficient construction whereby the lamp may be suspended to allow for a slight swinging movement. or be maintained in a rigid-or non-swinging position. v While a rigid connection between the lampand the mast arm isdesirable in some instances, the same is objectionable in other installations, due to the lack of flexibility under Wind loads, and

' also due .to the lack of adjustment to'compensate for any misalinement of the mast arm.

To obviate these and other objectionable features,and .to provide a device usable under various conditions and requirements, my invention contemplatesa lamp suspension hanger or fitting construction capable of selective application to provide either a rigid or an adjustable non-rigid mounting for a lamp as desired.

Further objects are, to provide a device of thecharacter stated .of simple, inexpensive and durable construction, capable of application to various types or equipment.

Additional objects and advantages will become apparent from the following description taken in connection with the accompanying drawing, wherein: V

Fig. 1 is an elevational view, partly in section, showing the application of my invention to a trolley type mast arm;

Fig. 2 is an elevational view of a portion of Fig. 1, taken at right angles thereto;

Fig. 3 is a vertical sectional view taken on the line III-III of Fig. 1, showing the parts in adjustable relation;

Fig. 4 is an elevational view, partly in section, said section being taken on the line IVIV of Fig. 3;

Fig. 5 is a view similar to Fig. 3, showing the parts in rigid connection;

Fig. 6 is a sectional view taken on the line VI--VI of Fig. 5; and

Fig. 7 is an elevational view of the lamp hanger in position for application to a member fixed to the end of a mast arm.

Referringto the drawing, A designates a hollow mast arm, the outer end only being shown, it being understood that said arm extends horizontally from a vertical mast or pole to which the arm is secured by suitable bolts and guys.

Disposed partly within the hollow arm A is a carriage or trolley B, mounted on rollers or wheels 2 for travel longitudinally of the arm on a track 3. A drive; chain ,fl'iS secured "to the carriage and is actuated by a sprocket and crank (not shown), located atthe mast endiof the arm, for moving the carriage. The, carriage and its drivemeans are generally similar to that described in my pending application Serial No. 666,156,, filed April 14, 1933. The carriage B has a hollow fixed member 5 depending therefrom, this member 5 entersinto the construction of the lamp hanger and extends below the under side of the mast arm .A for cooperation .with a hanger member on the lamp, the lamp being diagrammatically indicated; at C.

Extending transversely through the member 5,

at right angles to the direction of themast-arm, i5-

is an angular opening or openings 6. As shown and as preferred the openings 6 are of square configuration and disposed diagonallywith respect tothemember 5.

I designatesa hanger member or fitting member designed for cooperation with the member ,5 and is preferably formed with spaced uprights 8 having alined openings 9., at least one of said openings Sbeing angular like anopening 6 of the member .5, both. as :to dimension and configura tion. Hanger member 1 is further provided with a threaded extension In for connection with an internally threaded portion on the lamp C.

II designates a bolt adapted to be entered in the openings 6 and 9 when the member 5 is embraced by the uprights 8 of member 1, and I2 designates a nut of a character to cooperate with the angular openings. 7

When it is desired to provide an adjustable or nonrigid connection between the lamp and the carriage of the mast arm, the bolt and nut are positioned as in Figs. 2 and 3, said bolt being supported in the lower portion of the opening 6 of the member 5, and the upper portions of the openings 9 of the uprights 8 suspending the hanger and lamp by contact with the end portions of the bolt, as clearly shown in Fig. 4, thus providing a pivotal or swinging connection for the hanger and lamp.

The nut I2 is provided with a washer-like flange 13 for engagement with the surface of an upright 8 through which the threaded end of the bolt ll projects, this construction permits a selective angular adjustment of the hanger and lamps as desired.

The adjustability thus provided is of considerable advantage in correcting and compensating for misalinement of the mast arm. For example, in erecting the mast arm, the same may not be exactly horizontal when applied, and it becomes vide against strain on the end of the mast arm due to heavy winds.

To provide a rigid connection between the lamp hanger members and the carriage or member to which it is applied, I provide th'e'nut I2 with means to prevent rotation thereof, preferably in the form of a complementary angular portion I4 of the same configuration as the walls of the openings 6 and 9 in the respective parts, said por tion I 4 being slightly smaller in size than said openings so asto snugly interfit therewith;

To accomplish the rigid'connection the nut is reversed with respect to the position of Figs. 2 and 3, and the portion I4 thereof is entered in the squared opening 9 of one of the uprights 8, said portion I 4 extending into the opening 6 of the member 5, thereby locking the hanger members in rigid assembly, as clearly shown in Figs. 5 and 6. Tightening the bolt I I will hold the parts in rigid connection.

It is therefore seen that by means of the angular openings in the assembled members and the complementary angular portion on the nut, I have provided a selective attachment whereby the hanger members may be connected in various ways to meet the various conditions encountered in practice.

While I have described the lamp suspension means or hanger assembly in connection with a carriage or trolley type of' mast arm, it is to be understood that the invention is not to be limited thereto, as the same may be applied to other types of mast arms and the like. For example, Fig. '7 illustrates a mast arm A having a fixed hanger member 5a depending from the outer end thereof, said member being provided with the squared opening 6 as before described, for co-action with the like openings 9 of the hanger member I.

Various changes and modifications are contemplated within the scope of the following claims.

I claim:

1. In a pivot joint construction, a pair of members adapted for connection and having angular openings therethrough, a bolt supported in the lower portion of the opening of one of said members and contacting the upper portion of the opening of the other member for pivotally supporting the latter, and a nut for the bolt, said nut being reversible and having an angular portion of substantially the configuration as the walls of said openings for engagement with the openings of both members, whereby to selectively secure the members in rigid connection.

2. In a pivot joint construction, a pair of members adapted for connection and having openings therethrough of substantially square configuration, a bolt supported in the lower portion of the opening of one of said members and contacting the upper portion of the opening of the other member for pivotally supporting the latter, and a nut for the bolt, said nut being reversible and having a substantially square portion for alining engagement with the square openings of both members, whereby to selectively secure the members in' rigid connection.

3. In a pivot joint construction, a central memher and an embracing bifurcated member adapted for connection, said members having openings therethrough of substantially square configuration, a bolt supported in the lower portion of the opening in the central member and projecting on either side thereof for pivotal sup-porting engagement with the upper portions of the openings in the bifurcated member, and a nut for the bolt, said nut being reversible and having a substantially square portion for alining engagement with the square openings of both members, whereby to selectively secure the members in rigid connection.

JOHN T. SEYLER. 

